diff --git a/manager/src/main/java/org/jiayunet/service/MentorMockChatService.java b/manager/src/main/java/org/jiayunet/service/MentorMockChatService.java
index 28c12d0..6e5f030 100644
--- a/manager/src/main/java/org/jiayunet/service/MentorMockChatService.java
+++ b/manager/src/main/java/org/jiayunet/service/MentorMockChatService.java
@@ -79,12 +79,18 @@ public class MentorMockChatService {
             throw new RuntimeException("模拟对话生成失败", e);
         }
 
-        // 6. 入库
-        MentorMockChat record = new MentorMockChat();
-        record.setMentorId(mentorId);
-        record.setMessages(chatMessages);
-        record.setCreateTime(Instant.now());
-        mentorMockChatMapper.insert(record);
+        // 6. 入库（存在则更新，不存在则插入）
+        MentorMockChat existRecord = mentorMockChatMapper.selectOne(new LambdaQueryWrapper<MentorMockChat>().eq(MentorMockChat::getMentorId, mentorId));
+        if (existRecord != null) {
+            existRecord.setMessages(chatMessages);
+            mentorMockChatMapper.updateById(existRecord);
+        } else {
+            MentorMockChat record = new MentorMockChat();
+            record.setMentorId(mentorId);
+            record.setMessages(chatMessages);
+            record.setCreateTime(Instant.now());
+            mentorMockChatMapper.insert(record);
+        }
 
         // 7. 返回
         MentorMockChatDto dto = new MentorMockChatDto();